Board machine



C. L. ELLIS' BOARD MACHINE Sept. 27, 1932.

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I a Q i Q Patented Sept. 27, 1932 UNITED STATES PATENT OFFICE CHARLES L. ELLIS, OF BRADFORD HILLS, PENNSYLVANIA, ASSIGNOR TO DOWNING- TOWN MANUFACTURING COMPANY, OF DOWNINGTOWN, PENNSYLVANIA, A CORPO- BATION OF PENNSYLVANIA BOARD MACHINE Application filed October 16, 1930. Serial No. 489,215.

This invention relates to cylinder paper machines, and more particularly to an apparatus for transferring the formed paper web from the wet end of such machines to the press section of the machine.

An important object of the invention is to provide a structure deliverin the paper web or sheet formed on the cylin er molds to the first press in a much drier condition than has heretofore been possible and to attain this resufi: without the use of the usual primary press r0 s. I

A further object of the invention is the provision of a structure of this character eliminating the use of one of the usual long felts with its accompanying equipment of felt rolls, ide rolls, stretchers, whippers and the like,

t ereby reducing the power required in operation and eliminating the losses due to the 2 deterioration of such felts.

A further and more specific object of the invention is the provision of a structure of this character wherein the paper web or sheet is delivered to an endless carrier preferably consisting of a wire by means of which it is transferred to the first ress, the sheet while on the carrier being su jected to the action of a suction roll or rolls.

A further object of the invention is to provide in a construction of this character an arrangement such that the pick-up. felt and web after leaving the last cylinder of the ma chine ma be acted upon by an extractor press so that w en the felt moves to deliver the web to the endless carrier such web is dried to an extent that any extensive press action is unnecessary before the web 15 delivered to the drier.

These and other objects I attain by the construction shown in the accompanying drawings wherein, for the purpose of illustration, I have shown a preferred embodiment of my invention and wherein:

Fig. 1 is a side elevation of a cylinder paper machine illustrating a portion of the cylinder and press parts thereo and the intermediate transfer mechanism;

Fig. 2 is an enlarged diagrammatic view of the transfer mechanism Fig. 3 isa fragmentary diagrammatic view showing a possible modification of the arrangement of Figs. 1 and 2;

Fig. 4 is a semi-diagrammatic view illustrating a modification of the arrangement of Fig. 1 to include the use of an extractor press;

Fig. 5 is a view similar to that of Fig. 4 illustrating the substitution of a felt for the wire as an endless carrier; and

Fig. 6 is a fragmentary detail view showing the construction of the bottom roll of the ex tractor press.

Referring now more particularly to the drawings, and more particularly to Figs. 1 to 3 thereof, the numeral 10 indicates a cylinder vat which may constitute the solitary vat of the machine or the final of a series of such vats. This vat has arranged therein the usual cylinder mold 11 upon which operates a couch roll 12. In spaced relation to the vat 10 is disposed a final press section- 13. Between the vat 10 and the final press section 13 I dispose a transfer mechanism generally designated at 14 including a wire 15 passing over an end wire roll 16 of any ordinary or usual construction, arranged adjacent the vat, through a suction press comprising a transfer suction roll 17 and an imposed top roll 18 therefor, over an end roll 19, preferably a suction roll, disposed adjacent the press 13 and then back to the end wire roll 16, this stretch of the wire having associated therewith the usual stretch roll 20 and wire guides 21 and 22 which may be of the type ordinarily employed in such location.

The pick-up felt 23 of the vat end of the machine passes over the wire from the end wire roll 16 to the suction press roll 17 from which point it is returned over the top press roll 18 to the vat end of the machine. The paper web or sheet W picked up b the cylinder mold is transferred to the felt 23 and passes with this felt over the wire to the suction press roll 17. By this roll it is transferred to the wire and from this point moves with the wire to the suction end roll 19 where it is again subjected to the action of suction and transferred to the press end of the machine. Instead of the usual suction roll, as illustrated in Figs. 1 and 2, a suction roll having a porous, resilient covering 17o may be employed if so desired. Thiscovering will tend to shield the wire from the rapid wear ordinarily resulting when the wire is passed directly over a suction roll.

Use of apparatus of this character in transferring the paper web W from the cylinder to the press end of the machine results in the production of a sheet free from felt marks which can be produced at a much higher speed and with much less pressing and expenditure of power than is ordinarily necessary. Furthermore, the losses due to shrinkage with a construction of this character are materially reduced.

The structure just described is that set forth in my prior application, Serial No. 462,561 for .patent on multi-cylinder board machine, which was filed June 20, 1930, and of which application this application is in parta continuation. In Fig. 4 I have illustrated a modification of the foregoing structure wherein, instead of depending upon the suction press, designatedby the upper and lower rolls 17 and 18, for the removal of such a quantity of water as it will necessarily remove with the arrangement shown in these figures, I provide between the final cylinder mold and said suction press an extractor press 24 comprising a lower or extractor roll 25 and an associated upper press roll 26. This extractor press acts upon the felt 23 before it joins the endless carrier, the pulp web or sheet W coming in contact with the extractor roll 25. This roll isconstructed somewhat similarly to a cylinder mold but is more strongly made in order that it may withstand the heavy pressures placed thereon, compris ing a skeletonic cylindrical frame 27 and a wire cloth covering 28 therefor. At this time there is only associated with the paper web the felt 23 with the result that the extractor press removes considerable water from both the felt and the paper web, some of this water passing through the surface of the extractor roll 25 while the remainder thereof collects between the rolls 25 and 26 and is deflected by a slice 29. The wire covering of the extractor roll, not having the same aiiinity for the paper web as the felt, does not remove the web from the felt but permits it to continue with the felt until it passes through the suction trans fer press consisting of the rolls 17 and 18. The suction transfer press removes further water and serves to separate the paper web from the felt, which felt returns over the top of the cylinder mold or molds to again begin its pick-up travel while the web moves over the endless carrier to the final press 13. The extractor press 24; removes a very considerable amount of water from the paper, this amount generally being between one and onehalf (1 and two (2) tons per ton of paper finally produced by the machine. Due to the amount of water removed by the extractor press, a press felt may be substituted for the wire in a construction of this character if so desired, this arrangement being suggested in Fig. 5, the sole changes necessary to this arrangement being the provision of a-take-up for the felt 9a as suggested at 30. It will benoted that in each of the constructions the use of a long felt is eliminated with its associated mechanisms, thus materially reducing the actual cost of construction of the board machine and since the paper web produced may be delivered to the driers with a much smaller water content and at a much higher rate of speed than is possible with the ordi-' nary machine, the efiiciency of the entire organization is materially increased.

Since the structure hereinbefore set forth is but one of a number which might be adapted without de arting from the s irit of my invention, I 0 not wish to be an erstood as limiting myself thereto except as hereinafter claimed.

I claim:

1. The combination with a cylinder board machine including the usual endless felt receiving the wet pulp from the cylinder mold,

of an endless wire over which the felt passes and a pair of transfer press rolls between which the felt, the.pulp and the wire pass, said transfer press rolls being so constructed and arranged that the pulp is transferred from the felt to the wire.

2. In a cylinder board machine having the usual endless pick-up felt and press end, means for transferring the pulp to the press end comprising an endless wire and a press including a suction roll acting throu h the wire for transferring the pulp from t e felt to the endless wire.

3. In combination with a cylinder board machine comprising a wet end having theusual pick-up felt and the usual main press section, an endless wire receiving the pulp from said pick-up felt and transferring it directly to the main press section, and at least one suction roll associated with said endless wire to act upon the pulp through the wire during its passage thereover and to assist in the transfer of the pulp from said pick-up felt to the wire.

4. In combination with a cylinder board machine including the usual endless felt for receiving the wet pulp from the cylinder mold, of an endless wire and a suction press through which the wire, the pulp and the felt pass with the wire contacting directly with the suction roll of said press where y the pulp is transferred to the en ess wire, said suction roll having a porous resilient jacket.

6. The combination with a cylinder paper machine including the usual endless felt for receiving the wet pulp from the cylinder mold, of an endless wire over which the felt passes, a pair of transfer press rolls between which the felt, the pulp and the wire pass, whereby the pulp is transferred to the wire, and an extractor press between the rolls of which the felt passes'prior to joining the wire.

7. The combination with a cylinder paper machine including the usual endless felt for receivin the wet pulp from the cylinder mold, 0 an endless wire, a press including a suction'roll over which the wire, the pulp and the felt pass with the wire contacting directly with the suction roll, whereby the pulp is transferred to the endless wire, and an extractor press between the rolls of which the felt passes prior to joining the wire.

'25 v 8. In combination with a cylinder paper machine and a wet end having the usual pickup felt and the usual press section, and endless wire receiving the pulp from said pick-up felt and transferring it directly to the press end so of the machine, at least one suction roll contacting directly with said endless wire to act upon the pulp during its passage thereover, and an extractor press between the rolls of which the felt passes prior to joining the wire.

9. In combination with a cylinder paper machine and a wet end having the usual pickup felt and the usual press section, an endless wire receiving the pulp from said pick-up felt 40 and transferring it directly to the press end of the machine, at least one suction roll contacting directly with said endless wire to act upon the pulp during its passage thereover and to assist in the transfer of the pulp from said pickup felt to the wire, and an extractor press between the rolls of which the felt passes prior to joinin the wire.

10. In a paper mac 'ne, a pul web-forming mechanism including a pic -up felt, a

press section toward which the operative run of the felt moves, an extractor press through which the felt and its attached web pass immediately after completion of the pick-u run, an endless wire for transferring the web directly to the press section and means for transferrin the web from said felt to the wire, inclu ing a suction roll with which the wire. is in direct contact acting through the wire, the web, and the felt.

CHARLES L. ELLIS. 

